Method for removing hemicellulose in biomass raw material

A biomass raw material, hemicellulose technology, applied in the direction of sugar derivatives, sugar derivatives, sugar derivatives preparation, etc., can solve the problem of low utilization rate of biomass, to avoid a large amount of loss, high xylose yield, accelerate The effect of degradation rate

Inactive Publication Date: 2011-06-08
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to improve the application value of hemicellulose and lignin raw materials in the separation process and truly solve the problem of low utilization of the three major components of biomass, we hope to separate the three components one by one and use them separately

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, remove the hemicellulose in the corn stalk

[0020] Weigh 1.0g of corn stalk dry weight, crush it into particles with a particle size of 40-80 mesh, then put it into a stainless steel tubular reactor with a volume of 20ml, and add 0.02mol / L FeCl 3 solution 5ml, make Fe 3+ The ratio of corn stalks is 5.6mg: 1.0g, cover and seal, put in boiling water to preheat for 2min, immediately transfer to 220℃ sand bath to preheat for 1min, and finally put it into an oil bath with a reaction temperature of 200℃ React for 10 minutes. After the reaction, cool the tubular reactor to room temperature with cold water, filter, and collect the hydrolyzate and residue. The hydrolyzate was used to determine the recovery rate of xylose and xylooligosaccharides, and the residue was used to determine the removal rate of hemicellulose and the remaining rate of cellulose and lignin. The determination method refers to the American National Renewable Energy Laboratory "Determinatio...

Embodiment 2

[0021] Embodiment 2, remove the hemicellulose in the corn stalk

[0022] Weigh 1.0g of corn stalk dry weight, crush it into particles with a particle size of 40-80 mesh, then put it into a stainless steel tubular reactor with a volume of 20ml, and add 0.2mol / L Fe 2 (SO 4 ) 3 solution 10ml, make Fe 3+ The ratio of corn stalks is 224mg: 1.0g, cover and seal, put in boiling water for 2 minutes, then immediately transfer to a 160°C sand bath for 1 minute, and finally put it in an oil bath with a reaction temperature of 140°C for reaction 20min. After the reaction, cool the tubular reactor to room temperature with cold water, filter, and collect the hydrolyzate and residue. The hydrolyzate was used to determine the recovery rate of xylose and xylooligosaccharides, and the residue was used to determine the removal rate of hemicellulose and the remaining rate of cellulose and lignin. After corn stalks were treated under this condition, the removal rate of hemicellulose was 98.15...

Embodiment 3

[0023] Embodiment 3, remove the hemicellulose in the corn stalk

[0024] Weigh 1.0 g of corn stalk dry weight, crush it into particles with a particle size of 40-80 mesh, then put it into a stainless steel tubular reactor with a volume of 20 ml, and add 0.1 mol / L Fe(NO 3 ) 3 solution 10ml, make Fe 3+ The ratio of corn stalks is 56mg: 1.0g, cover and seal, put in boiling water to preheat for 2min, immediately transfer to 170℃ sand bath to preheat for 1min, and finally put it into an oil bath with a reaction temperature of 150℃ for reaction 10min. After the reaction, cool the tubular reactor to room temperature with cold water, filter, and collect the hydrolyzate and residue. The hydrolyzate was used to determine the recovery rate of xylose and xylooligosaccharides, and the residue was used to determine the removal rate of hemicellulose and the remaining rate of cellulose and lignin. After the corn stalks were treated under this condition, the removal rate of hemicellulose w...

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Abstract

The present invention discloses a method for removing hemicellulose in biomass materials. The method comprises the following steps: hydrolysis reaction that utilizes Fe<3+> to catalyze the biomass materials is carried out so as to remove the hemicellulose from the biomass materials and to transfer the hemicellulose into xylose and xylo-oligosaccharide. The method adopts Fe<3+> as a catalyst, which can accelerate the degradation rate of the hemicellulose and shorten the pretreatment time, or lower the pretreatment temperature with the same pretreatment time, thereby reducing part energy consumption in industrial production; when degrading the hemicellulose into the xylo, the Fe<3+> can also ensure the high yield of xylo and simultaneously reduce the side product of furfural, improve the recovery rate of the xylo and does not cause the degradation of great amount of cellulose and xylogen, thus realizing the separation of a monocomponent of the biomass materials. The Fe<3+> is recyclable and no effluent and waste are discharged in the production process. The method is an environment-friendly green production technology.

Description

technical field [0001] The invention relates to a method for removing hemicellulose in biomass raw materials. Background technique [0002] In recent years, the full utilization of biomass raw materials has been increasingly mentioned by people. From the perspective of industrial separation and utilization of the three major components in biomass raw materials, hemicellulose is generally directly hydrolyzed in the separation process to obtain xylose and xylooligosaccharides, which are used as food additives, feed additives or functional foods etc.; the separation and utilization of cellulose is absolutely dominant, and the cellulose obtained by separation is mainly used for papermaking and textiles. In addition, the monosaccharides after hydrolysis of cellulose can be used in many fields such as ethanol fermentation; the remaining wood after pretreatment Most of the residues are directly used as fuel. [0003] Among the many pretreatment methods, acid pretreatment and alka...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H1/00C07H3/02C13K13/00B01J27/053B01J27/25
Inventor 孙君社刘莉刘萍张京声
Owner CHINA AGRI UNIV
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